Auto power folding tool grinder



April 14, 1925.

H. R. SCHODROWSKY AUTO POWER FOLDING TOOL GRINDER Filed Sept, 26. 1923 2Shaatg-Sheet l April 14, 1925.

H. R. S CHODROWSKY AUTO POWER FOLDING TOOL GRINDER Filed Sept,. 26. 19232 Sheets-Shoot 2 Patented Apr.- l l, 1925.

UNITED STATES HERMAN n. scnonnowsxv, or MARION rownsnrr, SAGINAWcooN'rY, n cmean,

AUTO POWER FOLDING EOOL GRINDER.

Application filedxSeptember 26,1923. Serial No. 664,951

To all whom it may concern:

Be it known that I, I'IERMAN R. Sci-1oonowsnr, a citizen of the UnitedStates, residing at Marion Township, in the county of Saginaw and Stateof Michigan, have invented certain new and useful Improvements in AutoPower l olding Tool Grinders, of which the following is a specification,reference being had to the accompanying drawings. I i i This inventionrelates to grinding apparatus and has for its object the provision of anovel portable device designed to be set up and used wherever desiredand so constructed and arranged as to be driven from a jacked up rearwheel of an automobile.

An important object is the provision ofv a device of this characterwhich may be folded into compact form for convenience in transportationor storage -or to facilitate its being hung up on the wall of agarageorthe like.

Another object is the provision of a grinder equippedwith l'l ootoperated means for holding the drive element thereof in firm engagementwith an automobile wheel regardless of the height to which the same maybe jacked.

An additionalobject is the provision of a grinder which will be simpleand inexpein siveto manufacture, easy to set vup or collapse, ethcientand durable in service and a general improvement in the art.

With the above and other objects and advantages in view, the inventionconsists in .the details of construction .to be hereinafter more fullydescribed and claimed, and illustrated in the accompanying drawings ,inwhich set up and engaged with a jacked up automobile wheel;

Figure 2 isa plan View; I

Figure 3 is a detail section on the line 7 3-3 of Figure 1;

Figure 4. is a cross section on the line l-s lof Figure l.;,and IFigures is asideelevation showing the device folded.

Referring .now..mre particularly to the drawings I lhaveishown thedeviceas comprising a basetrame designatedzbroadly by .the numeral 10and including elongated side bars 11 connected at one end by abolt 12which passes through a spacing sleeve j to be described.

At the other end of this frame is a spacing sleeve 14: through whichpasses a rock shaft which extends through the bars 11 and which has oneend extended laterally to define a. crank 16 terminating in a pedal 17.

This shaft is square in cross section for r a purpose to be described. aPivoted by a bolt 18 which passes through pair of bars 20 secured uponopposite sides oi atilled block 21. Pro ecting outwardly from the sidesof thejbars 20 intermediate the ends 1 thereof are pins 22 for a purposeto be described. Pivoted on the rock shait 15 are twobars 2 3 whichextend upwardly M and rearwaridly and which are curved intermediatetheir ends as illustrated. Thesebars are held ,in the proper spacedrelation 'bya bolt 2a which passes through a spacing sleeve, 25. Attheir rear ends the bars 23 ,carryga .seat' 26 for the operator. Attheir lower :edges ,the bars ,23 are formed with notches '27 ,whichengage upon the pins 22 for holding-the standard 19 in a certain fixedposition while in ,use.

Rigidly secured on the rock shaft 15 are links 28 which in actualpractice ,maysimply both bars 11 is a standard 19 including a v beprovided at their lower ends with square holes within which the shaftfits conformingly. of the links ,28; are other links .29 pivoted theretoby a bolt 30 which passesthrougha spacing sleeve 31 which abuts againstthe confrontingbases ofthe links 29. I

Pivotally connected with the upper ends or the bars 20 are forwardly anddownwardly vextending bars32to which. the upper ends of the links 29areipivotallyv connected at33.

.Journaled at oat-between the forward ends Figure 1 1s a side elevationof the device of thebars-SQ; isa grooved roller 35 shaped at itsperiphery for engagement with the tireA otan automobile wheel B. Thisroller 35 is iormedwith a groove 36 for a purpose At the juncture of thebars 20 and32 I provide the grinder wheel which is here shown as being adisk 37 of emery, :carborundum or the like, which disk is mounted upon asleeve .88 which projects :from one side ot a grooved ,pulley 39. Thegrinding wheel is secured onthe sleeve by meanslof a clamping nut 40screwedthereonto. Passing through the sleeve 38 is astationary spindle41 whiclrhas its ends 452 reducedandthreaded and passing through the{bars '20 Land 32,

Disposed inwardly. of the upper ends i securing being eifected bysuitable nuts 43. I provide a belt 44 whichis engaged about the roller35 within the groove 36 therein and which is also engaged about thegrooved pulley 39. This belt may be crossed or not, whichever ispreferred.

The set up position of the device is shown in Figure l and it is to benoted that the automobile wheel to be used for driving the device mustbe jacked up or supported by some means in elevated position. The op-'erator intending to use the device takes his place upon the seat 26 andengages one foot upon the pedal 17, the device bein of course locatedrearwardly of the wheelIB to be used for driving. By pressing upon thepedal 17 the shaft 15 is rocked which tends to straighten the toggleformed by the links 28 and 29 and this results in swinging the bars 32upwardly so that the roller 35 will be brought firmly into engagementwith the tire A. As the wheel is rotated it is quite apparent that themovement will be imparted to the roller 35 and consequently through thebelt 44 to the grinding wheel which is of course used in the ordinaryman ner for sharpening tools and the like. When use of the device is notdesired, it may be folded and this is readily accomplished by graspingthe seat 26 and lifting the bars 23 sul'liciently that the notches 27therein will be disengaged from the pins whereupon the standard 19 maybe swung forwardly, and downwardly toward the base 10. The pairs oftoggle links 28 and 29 swing forwardly so that the parts will lieclosely together. The bars, 23 are then allowed to drop down and thewhole apparatus will then be in very compact form which will beconvenient in transportation or storage. As a matter of fact the devicemight be readily hung up on a nail or hook projecting from the wall of agarage, tool house or other building.

From the foregoing description and a study of the drawings it will beapparent that I have thus provided a simply constructed and consequentlyinexpensive grinding machine which is readily capable of being driven bythe jacked up wheel of an automobile so that power will be veryconvenient and inexpensive. Owing to the movability of the rock shaftwhich operates the swingable bars carrying the roller it is apparentthat the power roller may be firmly engaged with the tire regardless ofwhether the wheel be jacked up slightly or to a great extent. Anotheradvantage of this feature is that should the operator desire to stop thegrinder it is merely necessary that he release the pressure upon thepedal whereupon the power roller will drop down out of engagement withthe tire. Owing to the fewness of the parts and the ruggedness of theconstruction it is apparent that there is little to get out of order sothat the device should have a long life and satisfae torily perform allof its functions.

While I have shown and described the preferred embodiment of theinvention, it is to be understood that I reserve the right to make suchchanges in the form, construction and arrangement of parts as will notdepart from the spirit of the invention or the scope of the sub-joinedclaims.

I claim:

1. A device of the character described comprising a base, a standardmounted thereon, supporting arms pivoted uponthe standard and carrying aroller adapted to be cngaged'against the tire of a jacked up motorvehicle wheel, a grinding wheel journaled on the standard, and anoperative connection between said roller and said grinding wheel forimparting movement to the latter when said vehicle wheel is rotated.

2. A device of the character described comprising a base, a standardthereon, arms pivoted upon the standard and carrying a roller adapted tobe engaged against the tire of a jacked-up motorvehicle wheel, agrinding wheel journaled' on the standard, an operative connectionbetween the roller and the grinding wheel for driving the latter, andmeans for swinging said arms to bring the roller into engagement withthe vehicle wheel.

3. A device of the character described comprising a base, a standardmounted thereon, supporting arms pivoted upon the standard and carryingaroller adapted to be engaged against the tire of a jacked up motorvehicle wheel, a grinding wheel journaled on the standard, an operativeconnection between said roller and said grindin wheel for impartingmovement to the latter when said vehicle wheel is rotatechand pedaloperated means for swinging said pivotedarms to bring said roller intoengagement with the vehicle wheel.

4. A device of the character described comprising a base, a standardmounted thereon, supporting arms pivoted upon the standard and carryinga roller adapted to be engaged against the tire of a jacked up motorvehicle wheel, a grinding wheel journaled on the standar an operativeconnection between said roller and said grinding wheel for impartingmovement to the latter when said vehicle wheel is rotated, said standardbeing pivoted on the base and swingable toward the same, and means forholding said standard normally against swinging movement.

5. A device of the character described comprising an elongated base, astandard.

pivoted thereon, bars pivoted on the forward end of the base andstraddling the standard, means on said bars and the stand ard fornormally holding the standard in upwardly extending position, a grindingwheel journaled on the standard, supporting bars pivoted on the standardand carrying a roller adapted for engagement with the tire of a jackedup motor vehicle wheel, a drive connection between said roller and thegrinding wheel, toggle links pivotally connected with said supportingbars and with the base, and pedal operated means for moving said linksto bring said roller into engagement with the vehicle tire.

6. A device of the character described comprising an elongatedsupporting base,a standard pivoted thereon and carrying a grindingwheel, upwardly and rearwardly extending bars connected with the forwardend of the base and carrying a seat rearwardly oi? the standard,forwardly and downwardly extending bars pivoted upon the standard andcarrying a roller grooved for engagement with the tire of a jacked upmotor vehicle wheel, a belt connection between said wheel and rollertoggle links pivotally connected with said last named bars and with thebase, and pedal means con-n nected with the lowermost toggle links forstraightening the toggle and swinging said rolle carrying bars.

7. A device of the character described comprising a base, a standardpivoted theretire oi a jacked up motor vehicle wheel,

pedal operated means for swinging said last named bars, and a driveconnection between said roller and grinding wheel.

In testimony whereof I hereunto affix my signature.

HERMAN R. SCHODROW'SKY.

